Hasbro's been indicating that they would like to reintroduce the comic 2-pack concept at some point. Whether or not they're going to hold onto some EU characters that were in development for that eventuality remains to be seen. I was just looking through the EE exclusive comic 2-packs and there was supposed to be a set with Luke Skywalker in a white flightsuit and Han Solo from TESB. And they also said that there's likely to be a Force Unleashed II multipack some time early in 2012.
As for the EU figures on TVC cards? I think it's likely that Hasbro will play it relatively safe. Jedi and Sith seem to sell well. And some army builders, too.
But I think they're likely to focus on core characters from a few sources, and they're going to do so somewhat thematically. For instance, in TLC RED we got Jacen Solo, Jaina Solo and later this year comes Nom Anor. This appears to be Hasbro's nod to the NJO. It gives collectors a chance to group some characters together along a theme. In the NJO's case it's 2 x heroes and 1 x villain. This is a pattern we've seen before: in the 30AC line we got both Darth Revan and Darth Malak in the same wave so that these two KOTOR characters might complement one another.
Based on this pattern, it seems like Hasbro is likely to either pair up EU characters or complement some previous offerings. Bastila Shan is on the way. Is she supposed to add on to the previous KOTOR game offerings? Given what we've seen in the past that seems possibl, but I also wouldn't be surprised if we got another KOTOR game character. The ones that immediately come to mind would be a Sith Trooper, Darth Bandon, Carth Onassi or *SOME* way of representing Revan as a Jedi. I'd personally like to see Zaalbar or Master Vandar, but they seem like minor characters in comparison.
As for other EU character sources? I think video games can be a pretty strong contender. The ones that immediately come to mind would be from The Old Republic. The cinematic trailer "Deceived"
made a big splash, and I could see Hasbro trying to capitalize here.